Secondary Storage

File compression

File compression is to compressed a data into a file and reduce the storage requirements. For example, when a person need to send a lot of data to a another person through MSN or e-mails they will first compressed it into a file and then only send it to the person.

Head crash

A head crash is a physical destruction of a hard disk. It is due to misalignment, faulty parts, contamination with dust, as well as excessive jostling and temperatures, can cause the read/write head to collide with the disk's recording surface.

Internet hard drive

The internet hard drive allows us to store our files and data in it. It is a free drive space which we do not have to pay for it and the storage is not big enough which is not more than 2GB. You will have to purchase extra hard disk space if you need more than what they give you for free. They are supported by advertising and Internet companies.

Optical disc drive

Optical disc drive is to store digital data, images, music, text and etc. It is also a direct access storage device that is written and read by light. The optical disc can store up to 50GB file. The most common optical discs in use are CDs and DVDs. It is an advantage as it will not cause head crashes or corruption from stray magnetic fields.

Solid-state storage

The solid-state storage is a nonvolatile and removable storage medium. Examples of solid-state storage would be memory card and USB such as in cameras, mobile phones, digital video camera and etc. Many people use this solid-stage storage is because that it does not have moving parts and it also portable.